Tree diseases

An adult emerald ash borer nestles into a tan-colored tree trunk.

Insects slipping into the US are causing billions of dollars in damage

Economics

The US has two trade deficits: money and pests. A Congressional amendment would add some safeguards to clamp down on non-indigenous insects that are killing American trees.

A man, bundled up against the cold, walks past a street vendor's chestnuts as they roast in front of the Metropolitan Museum of Art in New York.

How to make sure those are American chestnuts roasting on your fire

Science

Invasive citrus disease found in California for the first time

Environment
The World

Fatal Pine Needle Disease: A U.S. Concern

The World

Return of the King